Posts Tagged ‘Automatic Bag Sealers’

Continuous Band Sealers – Everything You Need to Know

Friday, June 14th, 2013

Continuous Band SealersIf you are sealing bags on a daily basis and your volume is going up into the hundreds or even thousands per day, you may want to upgrade from your hand sealer and consider using a continuous band sealer (found here). These machines are designed to quickly seal a variety of thermoplastic bags shut at a high rate of speed. Many can seal anywhere from 20-30 bags per minute. These machines are used for packaging such products as liquids, powders, food, medical devices, parts and much more. This article will cover the different types of continuous band sealers available.

Continuous band sealers could almost be called automated bag sealers, because that is what they do. They take a bag and seal it with very little manual involvement. The operator of the machine takes the bag and inserts it into the machine where it then takes it and seals the bag shut. The bag is carried along a rubber conveyor until the process is done. Many of these sealers will seal up to 40 feet of bag per minute, which is extremely fast.

So what do these machines do? They seal the top of an open plastic bag shut for storage, packaging and retail purposes. This is done by using direct heat to melt the bag shut in a straight linear pattern. The width of the seal varies, depending on the machine. Most of the band sealers we offer produce an 8mm thick seal, however, some go as high as 15mm thick. The thicker the seal, the stronger the hold. You have probably seen examples of packaging sealed with a band sealer in the grocery store. Pretty much any bagged product you use has been sealed this way.

Most of the bags used with these machines are made using thermoplastic material that reacts with heat. This includes PP, PE, Laminates, stand up pouches, gusseted bags, moisture barrier bags and more. Continuous band sealers are available in several configurations, depending on the size of the bag you need to seal, the weight of the material being packaged, what you are packaging and much more. Here are a few things you may want to know when shopping around for a machine:

Horizontal or Vertical – Band sealers typically come in a horizontal or vertical configuration. This means they can seal a bag laying down or standing up. The design you get depends a lot on what you are sealing. Most people go with a horizontal design unless they are packaging something that could spill. If the bag contains powders, liquids, small pieces and other spillable items, you will want a vertical sealer.

Here is an example of a horizontal band sealer in action:

Here is an example of a vertical band sealer in action:

Tilting Head – Some of the vertical band sealers we offer have a tilting head to help assist with packaging liquids. Some of these sealers have a head that will tilt up to 30 degrees to assist with the sealing process.

Conveyor – Many band sealers offer the option of adjusting the height and depth of the conveyor. This is designed to accommodate the bag size. If the adjustments aren’t correct, it can make bag sealing more complicated.

Printing – Several band sealers offer the option of printing text and numbers along the seal. This may include the date, serial numbers and much more. There are several different methods of printing, depending on the machine. Here are the four most common:

  • Dry Ink Coding: This method prints black text or numbers along the band.
  • Color Ribbon Printing: Color ribbon printing provides a stronger adhesion print than dry ink coding and works best for humid environments.
  • Embossing Attachment: This method allows text to be embossed with heat along the band. This method does not use any ink.
  • Hot Ink Coding: Uses a hot ink method to print text and numbers along the sealing band.

This is a video of dry ink coding in action:

 

Most of the continuous band sealers we offer are made using stainless steel for food packaging purposes. Designs range from tabletop to floor models that include a stand and casters. Typically the larger the machine, the more throughput it allows.

Most of these sealers allow the operator to adjust the temperature, speed, fan control and much more. The control panels on these machines keep the settings all in a single location and the bulk majority of them are incredibly easy to set up and don’t require any special training to use.

You can find our entire selection of continuous band sealers here. Please feel free to give us a call at 1-800-658-8788 with any questions. We would love to help you out.

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